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High-resolution computed tomography in patients with bronchial asthma: correlation with clinical features, pulmonary functions and bronchial hyperresponsiveness

Authors
 Park JW  ;  Hong YK  ;  Kim CW  ;  Kim DK  ;  Choe KO  ;  Hong CS 
Citation
 JOURNAL OF INVESTIGATIONAL ALLERGOLOGY AND CLINICAL IMMUNOLOGY, Vol.7(3) : 186-192, 1997 
Journal Title
 JOURNAL OF INVESTIGATIONAL ALLERGOLOGY AND CLINICAL IMMUNOLOGY 
ISSN
 1018-9068 
Issue Date
1997
MeSH
Adult ; Aged ; Asthma/diagnostic imaging* ; Asthma/pathology ; Asthma/physiopathology* ; Bronchi/pathology ; Bronchial Hyperreactivity/diagnostic imaging* ; Bronchial Hyperreactivity/pathology ; Bronchial Hyperreactivity/physiopathology ; Female ; Humans ; Lung Diseases, Obstructive/diagnostic imaging ; Lung Diseases, Obstructive/pathology ; Lung Diseases, Obstructive/physiopathology ; Male ; Methacholine Chloride ; Middle Aged ; Tomography, X-Ray Computed*
Abstract
The high-resolution computed tomography (HRCT) studies for bronchial asthma (BA) have revealed abnormal radiologic findings such as bronchial wall thickening, bronchiectasis, emphysema and mosaic pattern of lung attenuation. But the clinical significance of these findings are not yet clarified. In this study, we quantified the bronchial wall thickness and evaluated HRCT features in 57 BA subjects (338 bronchi) who had precipitating factors of irreversible airway remodeling, 19 COPD subjects (70 bronchi) and 10 healthy subjects (23 bronchi). Then we correlated HRCT findings with the clinical features, pulmonary functions and methacholine PC20 (PC20M) and studied their clinical significance. The bronchial wall for BA was about 1.48 mm thicker than that for COPD and about 2.34 mm thicker than for healthy controls (p < 0.0001, respectively). But the individual mean ratio of bronchial wall thickness to luminal diameter (BWT/LD) in asthmatics did not correlate with the clinical features, lung functions and PC20M. Abnormal HRCT findings, such as bronchiectasis (17.5%), emphysema (5.3%) and mosaic pattern of lung attenuation (17.5%) were found in BA. These findings were more common in BA with moderate to severe airflow limitation (FEV1 < 80%, p < 0.05) and patients with these changes had a more prolonged history of asthma (p < 0.05). PC20M was higher in BA with these abnormal changes (p < 0.001) but these patients' FEV1 (p < 0.05), FEF25-75 (p < 0.05) and specific airway conductance (p < 0.05) were lower than those having BA without such findings. In this study we showed that the bronchial wall was more significantly thickened in BA but that it did not correlate well with the clinical features, lung functions and PC20M. Additionally, patients having BA with abnormal airway and air space HRCT findings had a prolonged history of asthmatic symptoms, loss of lung functions and decreased bronchial hyperresponsiveness. These results suggested the possibility that HRCT can be used for the differentiation of BA from COPD or healthy controls. Furthermore, patients having BA with abnormal HRCT changes demonstrate poor lung function and less hyperreactive bronchi than those without. We concluded that HRCT may be useful for the prognosis and treatment of bronchial asthma cases who have the precipitating factors of irreversible airway remodelling.
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Internal Medicine (내과학교실) > 1. Journal Papers
Yonsei Authors
Park, Jung Won(박중원) ORCID logo https://orcid.org/0000-0003-0249-8749
Hong, Chein Soo(홍천수)
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/177326
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